South Walton has one for girls under 13 that plays at Helen McCall. Sign ups are happening right now. I think the cutoff is end of this month. www.swyouthbball.com has all the scoop. My daughter used to play, but is now too old for the league. She loved it. I don't know what there is for adults.
I don't live there, but we were checking out softball last time we were down. I think we found fields behind the track place. Sorry, I don't know name, but the place w/ go carts, golf, games, carnival rides.